Answer:
Resistance.
Explanation:
The resistance of a conductor measures how much resistant it is to a flow of charge. Since the current is the flow of charge, its measure in a circuit tell us how much resistance there is. Thus, for a given voltage lower the current in the circuit, greater the resistance. This relation is summarized by Ohm's Law:
[tex]V =IR[/tex]
where [tex]V[/tex] is the voltage across the circuit, [tex]I[/tex] the current, and [tex]R[/tex] is the resistance.